1.In Table 1, the (8 – 6 – 8) notation for database 1 denotes the final architecture of the optimum network where each number,
respectively, represents: number of inputs (8), number of hidden nodes (6), and number of outputs (8). The statistical accuracy measures
of the auto-associative networks and ANN models for seven databases are shown together in Tables 2, 3, and 4 and their graphical
representations are, respectively, depicted in Figures 1, 2, and 3.